Hi, can I have some help with all these questions, please?

7. Find a formula for the quadratic function whose graph has a vertex at (-2,1) and passes through the point (3, -3).10. In 2014 the number of people infected by a virus Po. Due to a new vaccine, the number of infected people has decreased by 20% each year since 2014. In other words, only 80% as many people are infected each year as were infected the year before. Find a formula for P = f (n), the number of infected people n years after 2014. Graph f (n). Explain, in terms of the virus, why the graph has the shape it does.13. Will the graphs of f (x) = 9(1.05)*; g(x) = 2(1.1)* cross in the first quadrant? Full explanation is needed for full marks. 13 14. A sum of $850 is invested for 10 years and the interest is compounded quarterly. There is $1000 in the account at the end of 10 years. What is the nominal annual rate? What is the Effective annual rate? / 415. Find the effective annual rate if $5000 is deposited at 3% annual interest, compounded continuously. 13 16. Joe's Bank has an investment account that pays 2% interest per annum, compounded continuously. World Bank has an investment account that pays 4% interest per annum, compounded quarterly. If you were to invest $1,000 into an account for 1 year, which one would you choose? What about 30 years